Opal Titan #26
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$0.46
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Card Details
When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 4/4 Giant creature with protection from each of that spell's colors.
Illustrated by Paolo Parente
Rulings (6)
Oct 4, 2004
If the spell was colorless (an artifact), this card does not get any form of Protection.
Oct 4, 2004
It changes into a creature even if the spell is countered.
Oct 4, 2004
It triggers when the spell is cast, which means it becomes a creature before that spell resolves.
Oct 4, 2004
When it turns into a creature, it is no longer an enchantment.
Apr 1, 2008
A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.
Aug 1, 2008
A noncreature permanent that turns into a creature can attack, and its 
abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.